Cylinder.



K. SGHWARZ.

CYLINDER.

APPLICATION FILED MAB..18,1913.

1,107,850; Patentd Aug. 18, 1914.

KARL SCHWARZ, OF NUBEMBERG, GERMANY, ASSIGNOB TO MASCHINENFABRIK AUG BUM-NIIBNBERG A. G., 0F NUR-EMBERG, GERMANY.

CYLINDER.

Specification of Letters Patent.

Patented Aug. 18, 1914.

Application filed March 18, 1913. Serial No. 755.070.

To all 'whom it may concern:

Be it known that 'I, I{AR L Scuwxnz, a subject of the GermanEmperor, residing at Nuremberg, in the county of Mittelfranken and State of Bavaria, Germany, have invented certain new and useful Improvements in Cylinders of which the following is a specification.

This invention has reference to cylinders for double acting two-cycle internal combustion engines and pertains particularly to cylinders to he used in engines for ships.

Accordingly, the present invention has for its purpose to produce cylinders of simple castings embodying effective cooling devices. Furthermore, very short cylinders are constructed of the relatively lowest weight possible.

In order to render the invention entirely clear reference is had to the accompanying drawing in which a cylinder is represented in longitudinal, axial section which embodies in desirable form the present improvemcnts.

The entire cylinder consists chiefly of four castings of which two a, b form the upper half of the cylinder and two the lower one. Each of two such castings form one half of the cylinder. Taking, for instance, the lower half of the cylinder shown on the drawing, it is seen that the casting 0 forms one half f of the inner cylinder wall. and the casting d with the portion 9 forms the outer cylinder wall, whi e the flanges h and i serve for connecting the two walls. The casting d forms with its top portion one half of the exhaust port or channel k. The tubular castings d and b, and the other parts are connected by, means of flanges l. m. In order to obtain a very tight con nection the tubular part d. may be applied in a heated condition and allowed to cool whereby a resulting shrinkage produces a perfec-tunion. The exhaust channel or port It is connected to the inner cylinder wall by means of staffing boxes 0, as shown on the drawing, or this connection maybe effected by shrinking the exhaust port upon the cylinder.

In order to effect the circulation of water for cooling purposes in the desired manner openings p are provided in the wall 1' through which openings the cooling water from the space 1' passes intothespace a. The cooling 7 jacket with the spaces a is provided with several devices 9 for the purpose of -t'orcing the cooling water with great speed along the cylinder wall f.

Thus the invention presents a series of advantages: By the division of each half of the cylinder into two parts only relatively simple castings are required. The division of the inner cylinder wall in the plane A, B and the provision of the walls it of the exhaust port. or channel on the inner cvlinder wall by means of stutfing boxes 0 or by heating these parts and allowing them to cool in the desired location. unequal expansions of heat in the wall parts can not injure the same because the single wall parts may slightly shift one toward the other whereby the occurrence of cracks is prevented. The parts b, d being separate parts render it possible that they, as well as the inner cylinder wall f, may be turned off and thus reduced, accordingly, superfluous thicknesses of the walls are avoided and the lowest pcmibleweight of these parts is attained.

If desired the parts b, (i may be united by flanges n, n. 'As the space 8 withinthe coolmg arrangement is accessible devices may "be provided for securing an effective cooling, as shown on the drawing in form of the tubes 9 therein applied.

I claim as my invention;

1; A cylinder for double acting two-cycle internal combustion enginesfcqmposed essentially of four parts, the cylinder being divided in a plane passing through the exhaust channel and perpendicular to the cylinder axis, each of the castings at either side'of the division line consisting of one half of the interior cylinder wall, a portion of an outer part forming a water jacket adjoining the cylinder end, and connectingflanges for joining the jacket and the cylinder wall to the corresponding parts of the other cast ii. A cylinder for double acting two-cycle internal combustion engines composed essentially of four parts, the cylinder being divided in a plane passing through the exhaust channel andperpendicula'r to the cylinder axis, each of the castings at either side of the division line consisting of one half of the interior cylinder wall, a portion of an outer part forming a water jacket adjoining the cylinder end, connecting flanges for joining the jacket and the cylinder wall, to the corresponding parts of the other casting, and .110

stufiing boxes for tightening the adjoining parts near the divisionline.

3. A cylinder for double acting two-cycle internal combustion engines composed essen tially of four parts, the cylinder being divided in a plane pasqing through the exhaust. channel and perpendicular to thecylinder axis, each of the castings at either side of the division line consisting of one half of the interior cylinder wall, a. portion of an outer -art forming a water jacket adjoining the cy inder end, connecting flanges for joining the jacket and cylinder wall to the other casting, stufiing boxes for tightening the adjoini parts near the division line, and 15 conduits for the cooling water within the space of the water jacket.

In testimony whereof I afiix my signature in presence of two witnesses.

KARL SCHWA RZ.

\Vitnesses:

OSCAR BOOK, RALPH W. Fox. 

